Abstract:
This research presents cell-based smooth finite element method created by three sub-cell smoothing domains of plane stress problem. The stress results obtained from numerical analysis were compared to the theoretical results.
Numerical benchmark used in this research was a cantilever subjected to parabolic shear force at the free end. The control parameters were the 5 meshes and the three elements side ratios between smoothed and main element, which was equal in both axes. To establish the distribution of smoothing area over the whole problem domain, all smoothed elements were arranged using pattern called semi-unit cell.
The analysis result revealed that both mesh and the elements side ratios used to determine smoothing domains clearly led to the accuracy of the results. The mean tolerances of normal and shear stresses with 16x4 using coarsest mesh were 8.75% and 12.08%, respectively. At the finest mesh size with 48x12, those values were found decreasingly to 1.41% and 2.24%. The effect of elements side ratios was also found to be the same trend as meshing. When comparing both normal and shear stresses at 0.2-0.3 and 0.4-0.5 of elements side ratios, it demonstrated that the mean tolerances decreased from 8.75% and 12.08% to 5.86% and 9.80%, respectively.